/*
 * Copyright 2011, 2012 Chris Banes.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package uk.co.senab2.photoview2.gestures;

/**
 * OnGestureListener.
 *
 * @author author
 * @version version
 */
public interface OnGestureListener {
    /**
     * onDrag .
     *
     * @param dx dx
     * @param dy dy
     */
    void onDrag(float dx, float dy);

    /**
     * onFling .
     *
     * @param startX    startX
     * @param startY    startY
     * @param velocityX velocityX
     * @param velocityY velocityY
     */
    void onFling(float startX, float startY, float velocityX, float velocityY);

    /**
     * onScale.
     *
     * @param scaleFactor scaleFactor
     * @param focusX      focusX
     * @param focusY      focusY
     */
    void onScale(float scaleFactor, float focusX, float focusY);
}